Our premium 1X Cannondale Hollowgram direct mount Oval chainrings are designed for Hollowgram crank family. Compatible with old and newest models.tim
Advantages of our special Direct mount chainrings:
Hollowgram Oval chainrings allow for flawless 1x10/11 drivetrain setup. Reliable, extremely light, stiff and clean looking
Size (Mass +/-1g): 30T(61g), 32T(66g), 34T(72g)
Color: Black, Green
Compatibility: Cannondale Hollowgram Si, SiSL, SiSL2 and newest F-Si
Material: cnc machined 7075 Txxx Aluminum. Long-lasting construction
Chainline: 47-50mm (3.7mm offset). Chainline depends on the length of the axle you use and spacers configuration.
Ovality: Optimized to each size separately. Range: 10.2-14.4% and Timing of 110.5-116.3° after TDC (top dead center) Patent Pendingy
Designed in UK. Manufactured in Poland (EU). The lightest solution on the bicycle market – period.imized to each size separately. Range: 10fffand fTiming of 110.5-116.3° after TDC (top dead center) Patent
Word on BIOPACE
Please understand that this is not Biopace technology. Shimano created Biopace with the completely wrong orientation of the biggest radius of the oval. Instead of positioning it in power zone which is slightly below the level of the crank, they clocked it to the dead zone where human generates least power. The result was that in power zone pedaling was too easy and in dead zone very difficult. Exactly opposite to how it should be.
Other elliptical chainrings
Clocking (timing) and shape of the oval are the most crucial parts of the design. Ride quality of Absoluteblack Oval ring will be different to ovals from brand X or Y. 2 years of development of our ovals resulted in commercially most successful product of its kind. AbsoluteBlack is the First company who managed to successfully popularize ovals in mountainbike sport. Please note: Other manufacturers offer one timing and ovality setting for all chainring sizes, but pedaling behavior changes with each size considerably. To optimize for this, every chainring size needs to be a bit different. For example the smaller the chainring size the bigger the ovality has to be to help climb steeper hills more effectively. This is where we specialize in and optimize every size to particular pedaling style. This is also why we do not provide information about timing and exact ovality of the chainring as each one is different.